<template>
    <header class="header">
    <h1>小黑记事本</h1>
    <input
        placeholder="请输入任务"
        class="new-todo"
        v-model.trim="addContent"
        @keyup.enter="add"
    />
    <button class="add" @click="add">添加任务</button>
    </header>
</template>

<script>
export default {

}
</script>

<style>

</style>